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Automotive onboard load control apparatus and method

  • US 5,811,884 A
  • Filed: 01/17/1997
  • Issued: 09/22/1998
  • Est. Priority Date: 01/19/1996
  • Status: Expired due to Fees
First Claim
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1. An onboard load control apparatus comprising:

  • an onboard battery mounted on an automotive vehicle;

    an electrical load supplied with power from the onboard battery;

    a change-over switch coupled between the onboard battery and the electrical load;

    control means for controlling the operation of the change-over switch to switch the change-over switch between an ON state in which power is supplied from the onboard battery to the electrical load and an OFF state in which power is not supplied from the onboard battery to the electrical load;

    engine speed detection means for detecting the engine speed of an internal combustion engine; and

    fault judgment means for judging whether the electrical load is normal or faulty on the basis of an amount of fluctuation of the engine speed detected by the engine speed detection means before and after the switching operation of the change-over switch.

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